Improvement in shuttle-driving mechanisms for sewing-machines



E BROSEMANN, M. :ROSENSTOGK, 811 M R USSENBERGER.

Shuttle-Driving Mechanism for Sewing-Machines.

No. 204,291. Patented May 28,1878.

ml'nesses 172W 15 UNITED STATES PATENTQFFICE.

ERNST BROSEMANN AND MARTIN RUSSENBERGER, 'OF NEW YORK, N. Y., AND MORITZROSENSTOGK, OF HOBOKEN, NEW JERSEY.

IMPROVEMENT IN SHUTTLE-DRIVING MECHANISMS FOR SEWING-MACHINES.

Specification forming part of Letters Patent No. 204,291, dated May 28,1878; application filed I February 19, 1877.

To all whom it may concern:

Beit known that we, ERNST BROSEMANN and MARTIN RUSSENBERGER, of thecity, county, and State of New York, and MORITZ ROSENSTOGK, of the cityof Hoboken, county of Hudson, and State of New Jersey, have inventedcertain new and useful'lmprovements in ShuttleDriving Mechanisms forSewing- Machines, of which the following, with the accompanying drawing,is a specification.

Similar letters refer to like parts.

Our invention relates to that class of sewing-machines in which twoparallel seamsare sewed at the same time, our object being to provide asimple and efficient mechanism to form two independent seams at the sametime by one operation of the machine. For this purpose we employ themechanisms and parts hereinafter described.

Two horizontal levers are suitably pivoted to the under side of theplatform of the machine. The platform has an extension or auxiliaryplatform, which forms a bracket for one of the shuttle-levers. Eachlever carries a shuttle at one end, and they have an equal andsimultaneous movement, one of the lovers imparting its motion directlyto the other by means of a pitman, the motion of the first lever beingobtained from a main shaft, which operates a vertical lever in the postor arm of the machine. I

The feed mechanism is in part secured to a bracket of suitable form,which is fastened to the under side of the platform inside of theshuttle-race, instead of outside, as formerly, but projecting over theshuttle-race so as to bring it in proper position for the feed, and topermit the shuttle-levers to move unobstructed to the end of theirtraverse.

The feed-bar carries a roughened head, formed to suit the double work tobe performed, and having a set of feed-points for each seam, the lengthof stitch being regulated by any customary device.

The devices for holding the goods, controlling the thread, andregulating the tension are the same as ordinarily used.

In the drawing, A and A are the levers, with cranks O G fixed thereto,each lever carrying a shuttle, D 1). The levers are suitably ,F. I is alever, pivoted to the platform, for

operating the lever G. K is a stud, which attaches the lever G to theprojecting bracket E. N is the lower end of the vertical lever,

which receives motion from the main shaft and operates the lever A P Pare needleslots in the shuttle-race.

Motion being given to the machine, a vertical lever, N, gives areciprocating motion to the shuttle-levers A A with their cranks O G.The pitman B conveys motion from A to the lever A. The rod H raises thefeed-bar F, when the operation of feeding takes place. I moves the leverG, which, inturn, moves the feed-bar the required distance.

It willbe seen that by fixing the crank G of the lever A on the oppositeside, thelevers will move in an opposite direction. A We have now fullydescribed our invention. What We claim is- 1. The combination of the twoshuttle-levers I A A the cranks G C, and the pitman B, connecting thesaid levers, andcausin g them to impart simultaneous movement to theshuttles in circular arcs, as explained. I,

2. The combination of the extended table or platform Y Y, two levers, AA crankarms 0 O, and connecting-rod B, as and for the purposes setforth.

3. The projecting bracket E and a suitable feed mechanism mountedtherein, in combination with the table Y Y, levers A A crankarms 0 G,and connecting rods B, as and for the purposes set forth.

ERNST BROSEMANN. MARTIN RUSSENBERGER. MORITZ ROSENSTOOK. Witnesses:DAVID FRIEDMANNY,

OHAs. T. BRUEN.

